JP2987819B2 - Rotary treatment device for endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope capable of easily attaching and detaching a rotation treatment member to and from a rotational force transmitting member provided at a distal end of an endoscope insertion portion, and preventing the rotation treatment member from falling off at the time of attachment. The present invention relates to a rotary treatment tool device.

[0002]

2. Description of the Related Art In recent years, industrial endoscopes capable of inspecting pipes of a chemical plant and the inside of an engine without disassembling have been widely used in the industrial field.

[0003] For example, in a jet engine, when an endoscope inspection finds a damaged portion such as a defect in the blade of a turbine blade that is driven to rotate, if the damaged portion is left as it is, stress is applied to the damaged portion. Concentrating, the damage is greater, and the entire blade must be replaced.

As described above, conventionally, even if replacement is not required, when a damaged portion is found, it is dealt with by disassembling the engine and grinding the periphery of the chipped portion. There was a drawback that it took time to repair.

For this reason, a conventional example in which a rotary treatment member such as a grindstone is attached to the distal end portion of an endoscope, and this rotary treatment member is inserted into a jet engine to grind a damaged portion (for example, see Japanese Patent Application Laid-Open Publication No. 58-162924).

[0006]

By the way, in many cases, this kind of rotational treatment member is provided at the distal end of the endoscope insertion portion, and is provided with a screw portion and a rotational force transmitting member for transmitting the rotational force.
It is detachable via fastening means such as a three-jaw chuck, a collet chuck and the like, and can be replaced as appropriate according to the treatment purpose, application, and the like.

For example, when treating a blade or the like of a jet engine with an endoscope provided with a rotating treatment member, it is necessary to reliably prevent the grinding stone from falling into the engine. In general, when grinding metal, the grinding characteristics differ depending on the rotation direction of the grindstone, so it is necessary to select the rotation direction and use it properly. When performing the treatment, if the screw is rotated in the direction in which the screw between the rotational force transmitting member and the grindstone is loosened, the grindstone falls off, and the rotation direction is unified, which is inconvenient.

In the case of a three-jaw chuck, a collet chuck, and the like, since the grindstone is fixed to the rotational force transmitting member only by the frictional force, the grindstone may fall off due to a slight loosening of the chuck. It is necessary to sufficiently understand the relationship with the transmission torque in advance, and the workability is poor.

Further, since the rotation treatment member is fastened to the rotation force transmission member using a three-jaw chuck and a collet chuck, the structure becomes large and the weight is increased. Have difficulty.

[0010] In the case of using a widely used guble nut as a fastening means, individual differences in the tightening torque are likely to appear, and if a uniform tightening torque is to be obtained, the replacement work becomes more complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and allows a rotation treatment member to be easily and securely attached to a rotation force transmission member provided at the distal end of an insertion portion without falling off. It is an object of the present invention to provide an endoscope rotary treatment device that is easy to use.

[0012]

According to the present invention, there is provided an endoscope rotary treatment device having at least an objective optical system and a rotational force transmitting member for supporting the rotational treatment member at the distal end of the endoscope. In the rotary treatment tool device for use, a hollow portion into which a support shaft provided on the rotary treatment member is engaged at a distal end portion of the rotational force transmitting member,
A first portion penetrating in a direction perpendicular to the axis of the support shaft to the hollow portion;
A hole , provided in the support shaft, the support shaft in the hollow portion
When it is engaged with the first hole, the shaft of the support shaft
A second hole drilled in the orthogonal direction, and the first and second holes
Has a long axis in the direction perpendicular to the axis of the support shaft.
A connection pin , a pin retaining cover for closing the first hole, and a biasing member for biasing the first hole in a closing direction .
It is characterized by having .

[0013]

According to the present invention, the torque transmission from the rotational force transmitting member to the rotational treatment member is performed by using the outer periphery of the distal end of the rotational force transmitting member.
A first hole penetrating from the first member to the hollow portion and the rotation treatment member
This is done through a connecting pin that passes through the second hole provided in the support shaft of the above, and is prevented from falling out by a pin retaining cover that closes the first hole. Regardless of the direction of rotation, the connection between the rotational force transmitting member and the rotational treatment member is not released.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 11 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a distal end portion of an endoscope, and FIG. 2 is a longitudinal sectional view showing a coupling state between a rotational force transmitting member and a rotational treatment member. Area view, FIG.
Is a view taken in the direction of arrow III in FIG. 4, FIG. 4 is an overall configuration diagram of the endoscope apparatus,
5 is an overall configuration diagram of another endoscope apparatus, FIG. 6 is a cross-sectional view of a main part of an endoscope protection cover, FIG. 7 is a cross-sectional view of a main part of another endoscope protection cover, and FIG. Sectional view of a main part of an endoscope protective cover,
9 is a cross-sectional view of a main part of the endoscope distal end holder, FIG. 10 is a cross-sectional view taken along line X-X of FIG. 9, and FIG.

(Structure) As shown in FIG. 4, the endoscope apparatus according to the present embodiment includes an endoscope 1A, a light source device 2 and a rotation drive unit 3 connected to the endoscope 1A, And a controller 5 connected to the rotation drive unit 3 through the controller.

The endoscope 1A includes an elongated insertion portion 6, an operation portion 7 connected to the rear end of the insertion portion 6, a connection portion 8 connected to the rear end of the operation portion 7, A universal cord 9 extending laterally from the operation unit 7.
The end of the universal cord 9 is detachably connected to the light source device 2 via a connector 10. An eyepiece 11 is provided on the side of the connecting portion 8.

On the other hand, the insertion portion 6 is arranged in order from the distal end side.
A hard tip portion 12, a bendable bending portion 13 and a hard portion 1
4. A bending knob 15 for performing the bending operation of the bending portion 13 is provided on a side portion of the operation unit 7.

FIG. 5 shows an endoscope 1B in which the insertion portion 6 includes only the rigid portion 14. In the present invention, any of the endoscopes 1A and 1B can be applied, and the insertion portion 6 may be semi-rigid such as an interlock type helical tube.

Reference numeral 18 denotes a jet engine as an object to be inspected. An access port 20a is provided on a partition wall 20 covering a compressor blade 19 of the jet engine 18.
The distal end 12 of the insertion section 6 of the endoscope 1 is inserted into the inside through the access port 20a.

As shown in FIGS. 1 and 3, the endoscope 1A
Tip body 12a provided at the tip of tip 12 of insertion portion 6
First, the illumination light from the light source device 2 is applied to the object to be inspected (in the drawing,
An illumination optical system 21 for irradiating 9) and an objective optical system 22 for observing the inspection object are held, and a tip member 23 of the rotational force transmitting member 17 is supported via a bearing 23a. The image formed by the objective optical system 22 is guided to the eyepiece 11 via the image guide 22a. Further, the tip member 23 of the rotational force transmitting member 17
Are connected to the rotation drive unit 3 via a flexible shaft 23b.

As shown in FIGS. 1 and 2, the hollow portion 2 is provided at the center of rotation of the distal end surface of the distal end member 23 of the rotational force transmitting member 17.
4 and a hooking hole 2 having a predetermined depth penetrating the hollow portion 24 in a direction perpendicular to the axis of the tip of the tip member 23.
4a is drilled. A pin retaining cover 25 is inserted through the outer periphery of the distal end member 23 on the distal end side, and a stopper 27 is fixed to the edge of the distal end member 23 by means such as adhesion. Further, between the flange 23c formed in the middle of the tip member 23 and the pin retaining cover 25, a spring 26 for constantly urging the pin retaining cover 25 in the direction of the stopper 27 is interposed. . The pin retaining cover 25 is connected to the stopper 27
Abuts on the leading end member 23 when the abutment 2
4a is closed.

Reference numeral 16 denotes a rotation treatment member, and an engagement hole 28a is formed in a direction orthogonal to the axis of a support shaft 28 provided on the rotation treatment member 16, and a grindstone 29 is provided at the tip of the support shaft 28. Is provided.

A support shaft 28 of the rotation treatment member 16 is inserted into a hollow portion 24 formed in the distal end member 23, and the engaging hole 28a and a retaining hole 24a formed in the distal end member 23 are provided.
A connecting pin 30 is inserted through the connecting member 30, and the distal end member 23 and the rotation treatment member 16 are connected via the connecting pin 30.

(Operation) Next, the operation of the embodiment having the above configuration will be described.

For example, when inspecting the damaged state of the compressor blade 19 of the jet engine 18 using the endoscope 1A and repairing the damaged portion, first, the distal end portion 12 of the endoscope 1A is connected to the jet engine 18 by the endoscope 1A. The operator inserts the inserted portion 6 into the access port 20 a formed in the partition wall 20 while observing the image of the eyepiece 11, and detects the damaged portion of the compressor blade 19.

When a damaged portion of the compressor blade 19 is found, the rotary drive unit 3 is driven by the controller 5 in a predetermined manner, and the torque from the rotary drive unit 3 causes the flexible shaft 23b of the torque transmitting member 17 to rotate.
The high-speed rotation of the distal end member 23 fixed to the distal end of the rotary member 16 causes the rotation treatment member 16 connected to the distal end member 23 via the connecting pin 30 to rotate at high speed in the same direction.

Then, the grinding wheel 29 rotating at a high speed is pressed against a damaged portion of the compressor blade 19 to perform a grinding process.

The grinding characteristics of the grinding wheel 29 differ depending on the direction of rotation.
In the case of grinding a metal such as 9, it is necessary to select the rotation direction of the grindstone 29. However, torque transmission to the grindstone 29 is performed via the connecting pin 30, and furthermore, the hook for engaging the connecting pin 30 is required. The stop hole 24a is provided in the tip member 23.
The pin 25 is closed by a pin retaining cover 25 that is inserted through the connector pin 25, and the pin retaining cover 25 is constantly urged in a closing direction by a spring 26, so that the connecting pin 30 does not fall off during rotation. Tip member 2
Since the rotation treatment member 16 and the rotation treatment member 16 are connected to each other via the connection pin 30, the torque can be reliably transmitted to the rotation treatment member 16 regardless of whether the tip member 23 is rotated left or right. .

Next, when exchanging the rotation treatment member 16 attached to the distal end member 23 of the rotational force transmitting member 17 protruding from the distal end surface of the distal end portion 12 of the endoscope 1A, first, the rotation treatment member 16 is inserted through the distal end member 23. The pin retaining cover 25 is slid in the direction of the flange 23c against the urging force of the spring 26 to expose the engaging hole 24a formed in the tip member 23.

Then, the connecting pin 3 is
0, and then the support shaft 28 of the rotation treatment member 16
From the hollow portion 24 formed in the tip member 23.

Thereafter, the support shaft 28 of the new rotary treatment member 16 is inserted into the hollow portion 24 of the tip member 23 so that the engaging hole 28a formed in the support shaft 28 and the engaging hole 24a are aligned. Then, the connecting pin 30 is inserted through the engaging hole 24a and the engaging hole 28a to connect the distal end member 23 and the rotation treatment member 16 to each other.

Then, the retaining hole 24a is closed by the pin retaining cover 25.

As described above, the rotation treatment member 16 can be easily replaced without using a tool or the like, so that workability is good.

By the way, as shown in FIG. 6, in a so-called small-diameter endoscope (including soft and hard) in which the diameter of the insertion portion 6 is relatively small, the insertion portion 6 is broken during handling such as storage and transportation. The protective cover 36 is attached for the purpose of preventing the above.

When observing a relatively shallow portion using the long narrow endoscope of the insertion portion 6, if the protective cover 36 is removed and used, the entire insertion portion 6 is easily bent and broken.

In such a case, without removing the protective cover 36, first, the protective cover 36 is formed, and the moving member 37 covering the distal end side of the insertion portion 6 is moved along the protective member 38 covering the base direction. The endoscope 12 is slid backward to relatively expose the endoscope distal end portion 12 through the escape hole 37a formed in the distal end surface of the moving member 37 (state (b)).

As a result, a shallow part to be inspected can be easily observed with a small-diameter endoscope having a relatively long insertion portion 6. The moving member 37 is provided with an O-ring 39 so as to generate an appropriate friction when moving. Reference numeral 40 denotes a stopper.

Further, as shown in FIG. 7, the moving member 37 may be screwed to the protection member 38 via the screw portion 41, and the moving member 37 may be rotated to move forward and backward.

Further, as shown in FIG.
Are biased toward the distal end by a coil spring 42, and a positioning pin 43 is provided on the moving member 37, and engagement grooves 44 with which the positioning pin 43 engages are provided on the protection member 38 at predetermined intervals, so that The exposure length of the mirror tip 12 may be set appropriately.

As shown in FIG. 9 and FIG. 10, when the endoscope endoscope 12 is held at the center of the tube 46 in the endoscope for rounding to take a picture of the inner wall of the tube 46, etc. In
Attach the holder 47 to the endoscope distal end portion 12, insert the endoscope distal end portion 12 into the tube 46, and when it reaches the desired observation site,
An operation wire 49 to be inserted through a guide pipe 48 attached to the endoscope insertion section 6 is pulled at a hand side.

Then, the guide ring 50 connected to the distal end of the wire 49 moves rearward along the insertion portion 6.

The distal end of the guide pipe 48 is fixed to the insertion portion 6 via a fixing ring 52 having an elastic member 51 having a diameter slightly smaller than the diameter of the insertion portion 6 on the inner periphery. 52 and the above guide ring 50
Are connected to each other via at least three equally-spaced resilient wires 53 arranged on the circumference.

When the guide ring 50 moves rearward along the insertion portion 6, the wire 53 bends outward, and the bending pressure of the wire 53 causes the endoscope distal end portion 12 to move the tube 46.
(The state of (b)).

If two wires 49 are provided at positions shifted by 180 °, the guide ring 50 can be moved smoothly. Further, when the endoscope distal end portion 12 is fixed at the center of the tube 46, a mechanism for locking the wire 49 may be provided on the hand side. Furthermore, if the wire 53 is slightly bent outward in the restored state, it does not bend inward.

The wire 53 is returned to its initial state by its own restoring force when the tension of the wire 49 is released.

Note that, as shown in FIG.
May be a rubber member 54.

(Second Embodiment) FIG. 12 is a perspective view showing a state of a distal end portion of an endoscope according to a second embodiment of the present invention.

In this embodiment, the operability of the pin retaining cover 25 when replacing the rotation treatment member 16 is to be eased.

When the rotation treatment member 16 is to be replaced, first, the pin retaining cover 25 inserted through the outer periphery of the tip member 23 is slid backward against the urging force of the spring 26. A slit 25 a is formed in one side of the pin retaining cover 25 along the axial direction, and a ridge 61 engaging with the slit 25 is formed on one side of the outer periphery of the tip member 23.

When the upper end of the slit 25a comes off the lower end of the ridge 61, the pin retaining cover 2
5, the upper end of the pin retaining cover 25 is hooked on the lower end of the ridge 61.

Then, the pin retaining cover 25 is held in a retracted state, and the engaging hole 24a formed in the distal end member 23 is exposed (state (b)).

Then, the connecting pin 3 is
Then, the support shaft 28 of the rotation treatment member 16 inserted into the hollow portion 24 of the tip member 23 is pulled out (state (c)).

Thereafter, the support shaft 28 of the new rotary treatment member 16 is inserted into the hollow portion 24 of the tip member 23, and the engaging hole 28a formed in the support shaft 28 and the engaging hole 24a are aligned. Then, the connecting pin 30 is inserted to fix the support shaft 28 to the distal end member 23.

Then, when the pin retaining cover 25 is turned to engage the slit 25a with the ridge 61,
The pin retaining cover 25 receives the urging force of the spring 26 and slides in the distal direction to close the retaining hole 24a.

As described above, when the pin retaining cover 25 is retracted, the workability when replacing the rotation treatment member 16 is improved because the pin retaining cover 25 is hung on the end of the ridge 61. Good.

(Third Embodiment) FIG. 13 is a longitudinal sectional view of a distal end portion of an endoscope according to a third embodiment of the present invention.

In this embodiment, the pin retaining cover 25 is screwed to the distal end member 23 of the rotational force transmitting member 17, and the pin retaining cover 25 is rotated to perform the forward / backward movement.

When the rotation treatment member 16 is to be replaced, first, a rod-shaped jig 66 is engaged with an engaging portion 23d formed in the middle of the distal end member 23 of the rotational force transmitting member 17, and the above-described distal end member is engaged. Hold 23.

Next, the pin retaining cover 25 screwed to the tip member 23 via the screw portion 67 is rotated, and the pin retaining cover 25 is retracted against the urging force of the spring 26.

The escape hole 25b formed in the pin retaining cover 25 is aligned with the engaging hole 24a formed in the tip member 23. The escape hole 25b has a diameter slightly larger than the engaging hole 24a, and when the pin retaining cover 25 is engaged with a stopper 27 provided at an edge of the distal end member 23, the escape hole 25b has the above-described shape. Escape hole 25b
Has moved to a position where it does not completely coincide with the above-mentioned hook hole 24a.

Thereafter, the connecting pin 30 inserted in the engaging hole 24a is pulled out, and the hollow portion 24 of the tip member 23 is removed.
The support shaft 28 of the rotation treatment member 16 inserted into the hollow treatment member 16 is removed, and the support shaft 28 of the new rotation treatment member 16 is inserted into the hollow portion 24.

The engaging hole 28a formed in the support shaft 28 is aligned with the engaging hole 24a.
0, and the rotation treatment member 16 is connected to the distal end member 23.

Thereafter, the pin retaining cover 25 is returned, and the engaging hole 24a is closed.

The lower end of the spring 26 is engaged with a stop hole 23e formed in the tip member 23 and is fixed by means such as welding.

[0066]

As described above, according to the present invention,
The support shaft of the rotation treatment member is engaged with a hollow portion provided at the distal end portion of the rotational force transmitting member, and an engaging hole drilled in a direction perpendicular to the axis of the support shaft and a locking hole drilled at the distal end portion. Since the connecting pin is inserted and connected, the locking portion is closed with a pin retaining cover, and the pin retaining cover is constantly urged in a direction of closing the locking portion with a biasing member. Even if the rotation treatment member is rotated to the left or right, the rotation treatment member is securely held and can be prevented from falling off.

Since the rotation treatment member can be removed by removing the connecting pin, the rotation treatment member can be easily replaced.

[Brief description of the drawings]

FIGS. 1 to 11 show a first embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of an endoscope distal end portion.

FIG. 2 is a longitudinal cross-sectional view showing a coupling state between a rotational force transmitting member and a rotational treatment member.

FIG. 3 is a view taken in the direction of arrow III in FIG. 4;

FIG. 4 is an overall configuration diagram of an endoscope apparatus.

FIG. 5 is an overall configuration diagram of another endoscope apparatus.

FIG. 6 is a sectional view of a main part of the endoscope protective cover.

FIG. 7 is a sectional view of a main part of another endoscope protective cover.

FIG. 8 is a sectional view of a main part of another endoscope protective cover.

FIG. 9 is a sectional view of a main part of the endoscope distal end holder.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

FIG. 11 is a cross-sectional view of a main part of another endoscope tip holder.

FIG. 12 is a perspective view showing a state of a distal end portion of an endoscope according to a second embodiment of the present invention.

FIG. 13 is a longitudinal sectional view of an endoscope distal end portion according to a third embodiment of the present invention.

[Explanation of symbols]

 1A, 1B endoscope 12 distal end 22 objective optical system 16 rotational treatment member 17 rotational force transmitting member 23 Tip portion (of rotational force transmitting member) 28 Support shaft 24 Hollow portion 28a Engagement hole 30 Connection pin 24a Locking hole 25 ………… Pin retaining cover 26 ………… Biasing member

Claims (1)

(57) [Claims] 1. A rotation treatment device for an endoscope, comprising at least an objective optical system and a rotational force transmitting member for supporting a rotational treatment member at a distal end portion of the endoscope. A hollow portion into which the support shaft provided in the rotation treatment member is engaged, and from the outer periphery of the distal end portion of the rotational force transmitting member to the hollow portion.
A first hole penetrating in a direction perpendicular to the axis of the support shaft, and a first hole provided in the support shaft and engaged with the support shaft in the hollow portion.
When the support shaft is in communication with the first hole, the support shaft is perpendicular to the axis.
And a second hole formed in the first and second holes, and the shaft of the support shaft is inserted through both the first and second holes.
It is provided a connecting pin having a major axis in the orthogonal direction, and the pin retaining cover for closing the first hole, and a biasing member for biasing the direction of closing the said first hole
Rotating the treatment instrument system for an endoscope, characterized in that that.